Auckland does not have a traditional "subway" system, but as of 2026, it is nearing the completion of its first major underground rail project, the City Rail Link (CRL). This 3.5km double-track tunnel runs beneath the central business district, effectively transforming the existing commuter rail network into a modern "metro-style" service. It includes two new underground stations, Te Waihorotiu and Karanga-a-Hape, which are the deepest in New Zealand. While the wider rail network is a surface-level commuter system, the CRL allows for much higher frequency and faster cross-city travel. For most of Auckland, transport still relies heavily on an extensive bus network and ferries, but the CRL marks the city's first true venture into underground urban rail.